
Syntax
y = - x

Purpose
Computes the negative of x .

Base
The operation in the syntax above must be supported for the case where the operand is a const Base object.

x
The operand x has one of the following prototypes       const AD<Base>               &x      const VecAD<Base>::reference &x 
y
The result y has type       AD<Base> y  It is equal to the negative of the operand x .

Operation Sequence
This is an AD of Base atomic operation and hence is part of the current AD of Base operation sequence .

Derivative
If $f$ is a Base function , $$\D{[ - f(x) ]}{x} = - \D{f(x)}{x}$$

Example
The file unary_minus.cpp contains an example and test of this operation.